The water can trap some heavier particles and water-soluble molecules, preventing them from entering the smoker's airways.

The lipid bilayers stop most water-soluble (hydrophilic) molecules passing through.

This is relatively simple for water-soluble molecules, such as amino acids, which can diffuse rapidly through the cytosol.

Nuclear pores in turn allow the transport of water-soluble molecules across the nuclear envelope.

Nuclear pore complexes allow the transport of water-soluble molecules across the nuclear envelope.

Crystalloids are aqueous solutions of mineral salts or other water-soluble molecules.

Cytosol mostly consists of water, dissolved ions, small molecules, and large water-soluble molecules (such as protein).

A lipid monolayer bubble can only contain oil, and is therefore not conducive to harbouring water-soluble organic molecules.

Nitrate (NO) is a water-soluble molecule made up of one nitrogen and three oxygen atoms.

Tropoelastin is a water-soluble molecule with a molecular weight of approximately 72,000 daltons.